Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b58319bf0d2447…

MALICIOUS

PDF

83.9 KB Created: 2021-06-30 11:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a38760a0da7186f37dd57763b36f0336 SHA-1: 1a7f90a08227c5be90610967abf850d308d0c352 SHA-256: d9b58319bf0d2447eb8c205cc07449a7b12a3f09d9de4130606350fd323a7446
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious or phishing content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://legouic-peinture.fr/userfiles/file/sogalugamut.pdf In PDF document text
    • http://abogarestudio.com/userfiles/file/58104322421.pdfIn PDF document text
    • http://teplospectr.ru/images/files/sizanagamemuwaximala.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c443b1016ff---tividex.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/87310011428.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/wojalosufurapifomu.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/57427693822.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/jijom.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/nokogew.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/kubakejuzizogataxoj.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/dutexajoxamiwuxil.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/nivokezujefikozejon.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd3a8e49a6---tafoja.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/450bdd7ead6cae6845551b71857e14ce/xegeta.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607881bbd96f2---xomalurajilopigotu.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/25861517776.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/betedem.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c8defb884d5---55910926337.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7dbb452360f63ffe343de762c6d2fab5/rufebujumujefizifisal.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/67692416334.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/wokapizapumadepevejivitu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=fortran+makefile+examplePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 10524 bytes
SHA-256: 490beadd32c19d192071dca9bb1f97c009da728b7cd06cc4d6d94542af6b113f
font_01_sfnt_off0000fd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD36 17232 bytes
SHA-256: 34fdf0c2967ee5e7633ffae32d49a85ee8ea590f0507f2f16a6f87bdd8681582
font_02_sfnt_off00012ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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